Fluid dispensing apparatus

ABSTRACT

Apparatus, or system, for dispensing a fluid characterized by a container holding the fluid; conduit and means for effecting flow of the fluid from the container to a location where it will be used, the conduit being connected with the container and an interiorly protruding conduit portion; and a gun for dispensing the fluid. The gun is connected with the conduit and has a valve for controlling the flow of the fluid. The valve in the gun is normally biased into a closed position and manually operable into an open position, and is discrete and removable such that once it starts to be unreliable as by leaking, it can be replaced without having to replace the entire gun. Also disclosed are specific fluids and preferred structural embodiments.

United States Patent [191 Brooks FLUID DISPENSING APPARATUS Dec. 11, 1973 ABSTRACT Apparatus, or system, for dispensing a fluid characterized by a container holding the fluid; conduit and means for effecting flow of the fluid from the container to a location where it will be used, the conduit being connected with the container and an interiorly protruding conduit portion; and a gun for dispensing the fluid. The gun is connected with the conduit and has a valve for controlling the flow of the fluid. The valve in the gun is normally biased into a closed position and manually operable into an open position, and is discrete and removable such that once it starts to be unreliable as by leaking, it can be replaced without having to replace the entire gun. Also disclosed are specific fluids and preferred structural embodiments.

5 Claims, 10 Drawing Figures PAtmmmzcl 1 ms 3. 7 77. 944

sum 1 0F 3 A TTOR/VEYS FLUID DISPENSING APPARATUS BACKGROUND OF THE INVENTION l. Field of the Invention This invention relates to apparatus for dispensing a fluid. In particular embodiments, this invention relates to a system for dispensing a fluid; such as, hairspray, shampoo or the like.

2. Description of the Prior Art A wide variety of containers have been employed for dispensing of fluids; for example, fluids for use by hairdressers or by the women in their own homes for treating of the hair. These have ranged from bottles having manually operated pumps through aerosol cans. When aerosol containers were employed the valves and associated elements were made as economically as possible and sometimes would corrode or become inoperable before even a single container of fluid was used. Moreover, the valves were integral with the containers, with no main valve to allow interchanging thereof.

Despite the wide variety of approaches to dispensing of the fluids, the prior art has not provided, as far as I am aware, apparatus, or system, in which a gun is connected with a main container of the fluid by means of conduit so that the particular fluid, such as hairspray or shampoo, can be employed at a location spaced from the container and in which the gun has a removable valve means so that only the inexpensive valve means need be replaced, once the performance of the gun becomes unreliable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial isometric view of apparatus in accordance with one embodiment of this invention mounted on a chair.

FIG. 2 is a cross sectional view of the container of the embodiment of FIG. 1.

FIG. 3 is a partial cut-away view of a preferred form of the conduit for use in the embodiment of FIG. 1.

FIG. 4 is a partial cross sectional view of the gun of the embodiment of FIG. 1.

FIG. 5 is a partial cross sectional view of the gun of FIG. 4, illustrating the valve means in its normal off position.

FIG. 6 is a partial cross sectional view of the gun of FIG. 4 illustrating the valve means in its on, or dispensing, position.

FIG. 7 is a side elevational view, partly in cross section, illustrating another embodiment of this invention, such as for use with shampoo or the like.

FIG. 8 is a partial cross sectional view of the ,gun of the embodiment of FIG. 7.

FIG. 9 is a partial exploded view of a gun in accordance with another embodiment of this invention.

FIG. 10 is a side elevational view, partly cut away, of the gun of FIG. 9.

DESCRIPTION'OF PREFERRED EMBODIMENTS It is an object of this invention to provide apparatus for dispensing of a fluid that obviates the disadvantages of the prior art. Specifically, it is an object of this invention to provide apparatus for dispensing the fluid in which the fluid is dispensed by a gun at a location spaced from the container of the fluid, the gun having an interchangeable, or removable and replaceable, economical valve means so that maintenance is inexpensive and simple. It is also an object of this invention to solve problems attending the use of a remote gun and interchangeable valve means and not heretofore delineated; the problems, such as skipping being defined hereinafter.

Other objects will become apparent from the detailed descriptive matter hereinafter, particularly when taken in conjunction with the drawings.

Referring to the figures and particularly FIG. 1, the apparatus 11 is installed on a chair 13, such as a hairdresser, or beauty operator, might use. As illustrated, the container 15 is connected with the base of the chair 13 by way of straps 17 having easily unfastenable buckles 19 to facilitate removal and replacement of the container 15. The container 15 is illustrated as being disposed on the side of a chair 13 for clarity of illustration. Ordinarily, it will be hidden from view by being fastened beneath the chair 13. The gun 21 is illustrated as being supported within a retainer bracket 23. The retainer bracket 23 may be fastened to the back of the chair 13 as illustrated, or it may be hooked over the top of the chair by means of a suitable thin metallic or plastic strap. In any event, the gun 21 may be readily picked up by the hairdresser to dispense the fluid onto the hair of the customer without having to walk to a storage location and pick up a container such as an aerosol can and return to the customer. Moreover, as will become apparent from the descriptive matter hereinafter, the gun, with its removable valve means may be employed repeatedly and the container 15 changed out as it becomes empty of fluid, a full container being replaced within the straps 17 and connected with the gun 21.

The apparatus 11 comprises the following elements or subassemblies: a container 15 for holding the fluid or fluids; means for effecting flow of the fluid from the container for being dispensed; conduit means such as conduit 27 for conducting the fluid to a location where it will be used; and a gun means such as gun 21 for dispensing the fluid.

Almost any fluid 29 may be dispensed by the apparatus of this invention as long as it does not clog the apertures and passageways in the valve means. The apparatus was developed and first used for dispensing liquids such as hairspray and shampoo formulations and will be described with particular respect to these formulations. Preferably, the hairsprays that are employed are aqueous-based formulations, such as those employing polyvinyl alcohol and starch. Almost any of the conventional shampoos may be dispensed with the apparatus of this invention.

The container 15 may comprise any of the conventional containers appropriate for use with the fluid and the means for dispensing the fluid. For example, the container 15 may comprise a conventional atmospheric container where the means for dispensing the fluid comprises a source of a compressed fluid, such as compressed air in an accumulator tank, and an aspirating nozzle, or pump, for sucking the fluid into the conduit to be dispensed from the gun 21. As illustrated, however, the container 15 is a pressurized container for containing both the fluid to be dispensed and a motive fluid such that the aerosol principle can be employed as the means for effecting the flow of the fluid from the container. In one embodiment of this invention, blended halogenated hydrocarbons are employed as the motive fluid, or propellant. Specifically, the motive fluid employed comprises 45 percent Freon 12. As is known, Freon 12 is dichlorodifluoromethane. The exact nature of the container that is employed will depend upon several factors, including the fluid to be dispensed and whether it is heavier or lighter than the motive fluid, and the position in which the container will be employed. As illustrated in FIGS. 1 and 2, the container 15 is employed on its side and the fluid 29 has a greater specific gravity than does the motive fluid 31. As illustrated in FIG. 2, the container 15 has a main valve for controlling the flow of the fluids 29 and 31. In particular, the main valve 25 allows stopping the flow of fluids and changing out the valve means in the gun 21, as described hereinafter. The conduit 27 is connected by way of valve 25 with an interiorly protruding conduit 33 that extends to the bottom of the container 15. As illustrated, the conduit 33 has a bent portion 35 that will effectively empty the container 15 of the fluid 29, regardless of whether the container 15 is on its side or in a vertical position.

A different type of container 15 is illustrated in FIG. 7. Therein, a less dense fluid 37 such as shampoo is to be dispensed, as by motive fluid 31 in aerosol manner. As illustrated in FIG. 7, the conduit 27 is connected to a short standpipe 39 for dispensing substantially all of the shampoo 37 above the motive fluid 31.

The conduit 27 may comprise any of the fluid impermeable conduit that is appropriate to the fluid being dispensed. Ordinarily, the motive fluid presents no problem since it will be a relatively inert fluid that will not attack the material of which the conduit 27 is constructed. Preferably, for dispensing the hairdressing fluid, such as hairspray or shampoo, the conduit 27 comprises a dental hygiene type conduit such as illustrated in FIG. 3. Therein, the conduit has a fluid impervious liner 41, which will be of a thermosetting plastic or the like that is impervious to attack by and impermeable to lateral flow of the fluid. The liner is disposed concentrically within a tube 43. The tube 43 will be of a material that has sufficient tensile strength to withstand the super atmospheric pressure of the motive fluid and the fluid contained within the container 15.

For example, the tube 43 may be of nylon tubing, poly ethylene tubing or other economical material having the requisite tensile strength to withstand the pressure. For safety an outer covering 45 is provided. As illustrated, the outer covering 45 is of a woven high strength material, such as nylon thread. The covering 45 provides an additional safety factor to prevent rupture of the conduit at the super atmospheric pressure. The conduit 27 is long enough to reach from the container 15 to the location where the fluid will be employed. For example, the conduit 27 is long enough to reach from the base of the chair 13 to the head of the customer therein. If desired, a central container 15 may be employed in a beauty shop with a plurality of individual conduits 27 extending from a header that is connected with the central container 15.

The gun 21 may take any desired form. For example, it may take the shape of a conventional gun with a trigger and butt. As illustrated in FIGS. 1 and 4, the gun 21 is a relatively linear structure that may be grasped by the hand and be operated by a finger to dispense the fluid comfortably and handily. Referring to FIGS. 4-6, the gun 21 is connected with the conduit 27 as by insertion and clamping a mechanically swaged clamp 47. An adhesive, such as epoxy resin, may be employed also, if desired. The gun 21 comprises an outer case 49 that is movable longitudinally of the conduit 27. The outer case 49 has a smooth cylindrical section 51 for fitting into frictional engagement with cap 53. The cap 53 has an interiorly threaded aperture 55 that engages the exteriorly threaded body 57 that is connected with the hose 27 by the mechanically swaged clamp 47. The outer case 49 may be readily slipped from its frictional engagement with the cap 53 and the cap unscrewed from the body 57 for easy disassembly.

The gun 21 has a valve means such as the valve 59 for controlling the flow of the fluid. The valve 59 is normally biased into a closed position, as illustrated in FIG. 5, and is manually operable into an open position, as illustrated in FIG. 6. The valve 59 is discrete and removable such that once it starts to be unreliable, as by leaking, it can be replaced without having to replace the entire gun 21. The body 57 has a bore 61 that communicates with the interior of the conduit 27. The gun 21 includes a nozzle means such as the nozzle, or finger button, 63. The nozzle 63 has a first passageway 65 extending therethrough and terminating in a discharge aperture 67.

The valve 59 has at least a portion that is disposed in the bore 61, and has a first portion 69 that sealingly engages the nozzle means, such as by an interior passageway 71. The first portion 69 has a second passageway 73 extending therethrough and in fluid communication with the first passageway 65 in the nozzle 63. The valve 59 has an inlet aperture 75 that is in fluid communication with the second passageway 73. The valve 59 has a second portion comprising resilient washer 77 that sealingly covers the inlet aperture in the normal off" position. Specifically, the resilient washer has an internal annular surface 79 that conformingly and sealingly fits over the inlet aperture or apertures 75 when the resilient washer is flat adjacent the end of the body 57, as illustrated in FIG. 5. As illustrated, the inlet aperture 75 is disposed in an annular recess, or groove, 84, on the valve 59 and the resilient washer 77 has its internal annular surface 79 ofa smaller diameter than the valve means so that it is retained in place by the annular recess. The resilient washer 77 has a peripheral portion 85 that is disposed adjacent and contiguous the end of the body 57. Biasing means which is inclusive of the spring 81 biases the valve 59 toward the normal of position. In the off position, the resilient washer 77 sealingly engages the annular shoulder of the valve 59 and the concentrically interior flange 83 of the top 53 to form a fluid impermeable seal that contains the fluid within the bore 61.

As illustrated in FIG. 6, the internal annular surface 79 of the resilient washer 77 is tiltable such that it becomes canted, or inclined, to effect communication between the inlet aperture 75 and the bore 61 when the resilient washer 77 is distorted, as by having the valve 59 pushed inwardly longitudinally of the bore 61 against the biasing means. The peripheral portion 85 of the resilient washer 77 is retained adjacent the end of the body 57 to effect the canting of the internal annular surface 79. The spring 81 is compressed by the inward movement of the valve 59 longitudinally of the bore 61, and serves, along with the fluid pressure, to return the valve 59 to its normal off position when the force on the nozzle 63 is released. The force is indicated by the arrow 86, FIG. 6.

The valve 59 is preferably formed of a non-corrosive material such as a thermoplastic material. The valve 59 is a precision fit valve such that there are no fluid leaks and such that it can be employed over the life of several containers full of the fluid to be dispensed. Moreover, the resilient washer 77, also is formed of a durable material like the thermoplastic or the synthetic rubber compositions such that the seal that it effects with the inlet aperture 75 is long-lasting and trouble-free. If the fluid has a low enough viscosity, a single inlet aperture may be employed. Preferably, a plurality of inlet apertures are employed where the fluid has appreciable viscosity; for example, as does shampoo or the like. The elements employed in conjunction with the precision fit valve 59 and resilient washer 77 are made of corrosionresistant materials, like stainless steel. Specifically, the spring 81 is a corrosion-proof" spring; such as, a stainless steel spring, a chrome-plated steel spring, or a copper alloy spring. The body 57 will be of a corrosion resistant material such as stainless steel. As indicated hereinbefore, in the prior art aerosol dispensing containers, corrodable materials were employed such that the user was lucky if the valve would last the life of a single container of fluid to be dispensed. As illustrated in FIG. 6, the first portion 69 has annular shoulders 87 thereon. The annular shoulders 87 are disposed such that they make sealing contact with the small aperture 89 of the cap 53 to direct the fluid through the respective passageways and out discharge aperture 69, instead of allowing it to escape out of the small aperture 89 in cap 53.

It is preferred that economical, corrosion resistant materials be employed in the subassemblies also. For example, the case 49 of the gun may be of economical thermosetting plastic. The cap 53 may be of suitable plastic having the desired structural strength. For example, it may be machined from nylon; orlon; or other thermoplastic materials, such as acrylonitrilebutadienestryrene copolymer (ABS).

In operation, the interiorly protruding conduit 33 is emplaced in the container with the main valve 25 before the respective fluids are charged to the container 15. The fluid 29 is emplaced in the container and the container is charged with the motive fluid 31. The main valve 25 is closed. The charged containers may be shipped to a remote using location. The conduit 27 and the gun 21 are attached at the shop or place where the apparatus will be employed. The gun 21 will have been pre-assembled as described hereinbefore. Accordingly, when the operator is ready to use the gun to dispense the fluid 29 from the container 15, he or she depresses the nozzle 63, moving the annular shoulders 87 into contact with the small aperture 89, simultaneously distorting the resilient washer 77 to put the inlet aperture 75 into communication with the fluid in bore 61 by canting the internal annular surface 79, as illustrated in FIG. 6. Accordingly, the fluid 29 flows outwardly through the conduit 27 under the force of the motive fluid-31. The fluid 29 will be saturated with the motive fluid 31, but the motive fluid 31 will vaporize at atmospheric pressure. The vaporization of the motive fluid is useful in effecting the aerosol spray of the fluid to be dispensed, increasing the effectiveness of a fluid such as the hairspray 29. After a sufficient quantity of hairspray 29 has been dispensed onto the hair of the customer, the hairdresser releases the force, indicated by arrow 86; and the biasing means, including spring 81, returns the valve 59 to the normal of position, as illustrated in FIG. 5. Accordingly, the hairspray 29 is sealingly contained by the gun 21 until the operator is ready to use it again.

As indicated hereinbefore, another embodiment of the invention is illustrated in FIG. 7. Therein, the fluid 37, such as shampoo, is less dense than and is disposed above the motive fluid 31. The gun 21 is illustrated in FIG. 8. As can be seen therein, the valve 59 is very similar to that described hereinbefore except it may have more inlet apertures if the fluid 37 is more viscous than the fluid 29. The valve 59 is disposed in the body 57 which is the same as described hereinbefore. To facilitate dispensing the shampoo 37, however, a nozzle 93 is employed that differs slightly from the nozzle 63. Specifically, the nozzle 93 has its first passageway 65 disposed axially within a pivotal member 95. The member 95 comprises a nylon cap that fills the aperture 97 in nozzle 93 and contains a tubular structure 99 disposed about the first passageway 65; the tubular structure 99 being formed of a relatively flexible thermoplastic material such that it can be pivoted by an inwardly-directed pressure, as by finger 101, shown in dashed lines.

In operation, the embodiment of FIGS. 7 and 8 functions substantially as described hereinbefore except that the interiorly protruding conduit is a short standpipe 39. As illustrated, the shampoo 37 is saturated with the vapor phase of the motive fluid 31 such that it emerges as a foam 103 that is most effective in cleaning and shampooing the hair or the like.

Another embodiment of this invention has been found helpful in preventing skipping in the spraying of certain fluids. The term skipping" defines the phenomenon wherein the motive fluid 31 like hairspray continues to spray without spraying the fluid 29. The reasons why skipping occurs and why this embodiment is effective to prevent it is not exactly clear. A theory is offered in explanation only, not in limitation, in connection with FIG. 10 later hereinafter.

Referring to FIG. 9, the gun 21 has the outer case 49, the cap 53, the conduit 27, the body 57, the mechanically swaged clamp 47, the valve 59, and the nozzle 63. An insert 109 is provided for insertion within an enlarged, single-diameter bore 61, however. The insert 109 has lip 111 and a seal, such as o-ring 113, for effecting a seal with the resilient washer 77 and the end of the body 57. The insert 109 has a body portion 1 15 defining an internal bore 61 that has the same shape and different portions for receiving the spring 81 and a part of the valve 59. The body portion 115 has an aperture 117 communicating between the exterior and the interior thereof; and has a stinger, or dip tube, 119. The stinger l 19 is connected with the body portion 115 and extends for an appreciable distance downwardly interiorly of the conduit 27. The stinger 119 has an axial passageway that communicates with the internal bore. It is theorized that a gas cap, or vapor lock, of gas 121 may form in normal dispensing operation because of dual-fluid flow phenomena and that skipping occurs when the gas cap becomes sufficiently large that it excludes the fluid 29; which may be, as indicated, in the form of propellant-saturated droplets of liquid 123. The stinger 119 extends a distance down conduit 29 such that it will continue to pick up and conduct the fluid 29 even though the gas cap has occurred. The distance may be, for example, from about 5 inches to a foot or more. Meanwhile, the aperture 117 continues to bleed off the accumulated gas and mix it with the fluid 29 to cause the gas cap to decrease without causing skipping.

The operation of the embodiment of FIGS. 9 and 10 is, to all external appearances, the same as described hereinbefore with respect to FIGS. 1-6.

Although this invention has been described with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and the scope of the invention.

What is claimed is:

1. Apparatus for dispensing a fluid comprising:

a. container for holding said fluid; said container being capable of sustaining superatmospheric pressure and having a main valve for shutting off the flow of said fluid such that a valve means in a gun means can be changed without emptying said container;

b. means for effecting flow of said fluid from said container for dispensing thereof; said means for effecting flow of said fluid from said container comprising a motive fluid stored in said container at superatmospheric pressure in conjunction with said fluid;

c. conduit means for conducting said fluid to a location where it will be employed; said conduit means being connected with said container and having a first conduit protruding interiorly of said container; said conduit means having an inner liner that is impervious to said fluid and connected with said first conduit; said conduit means having a high strength outer hose enclosing said inner liner for preventing bursting and cold flow thereof; and

d. gun means for dispensing said fluid; said gun means being connected with said conduit means; said gun means comprising:

a cap having an internally threaded aperture; an outer case adapted to conformingly fit said cap; a body connected with said conduit means and having a bore communicating with the interior of said inner liner of said conduit means; said body being of corrosion resistant material and including: A. an externally threaded portion threadedly connected with said internally threaded aperture of said cap; and B. a protrusion having a peripherally corrugated exterior for sealing connection with said conduit means;

nozzle means having a first passageway extending therethrough and terminating in a discharge aperture;

valve means having a first portion sealingly engaging said nozzle means and having a second passageway extending therethrough and communicating with said first passageway; said valve means having at least one inlet aperture communicating with said second passageway and penetrating laterally of said body; said valve means also having a second portion sealingly covering said inlet aperture in a normal of position; and biasing means biasing said second portion toward said normal of position; said second portion being movable into a second and on" position responsive to movement against said biasing means for controllably dispensing said fluid; said first and second portions of said valve means being easily and inexpensively replaceable such that once said valve means starts to be unreliable in operation, as by leaking, it can be replaced without having to replace the entire gun means; and

sealing means for sealingly connecting said protrusion with said conduit means; said sealing means comprising an adhesive material and a crimped metallic fitting compressing said inner liner and said outer hose against said corrugated exterior of said protrusion for maintaining the sealing connection and holding said fluid under said superatmospheric pressure.

2. The apparatus of claim 1 wherein said fluid is more dense than said motive fluid and said interiorly protruding conduit comprises an elongate conduit that extends to the bottom of said container in the position in which it will be employed for emptying said fluid as the lower layer of fluid in said container.

3. The apparatus of claim 1 wherein said fluid is less dense than said motive fluid and said interiorly protruding conduit comprises a short standpipe such that it will dispense said fluid as the upper layer above said motive fluid.

4. The apparatus of claim 1 wherein said conduit means comprises dental hygiene hose with an impervious inner liner.

5. Apparatus for dispensing a fluid comprising:

a. container holding said fluid;

b. means for effecting flow of said fluid from said container for dispensing thereof;

c. conduit means for conducting said fluid to a location where it will be used; said conduit means being connected with said container and having a conduit protruding interiorly of said container;

d. gun means' for dispensing said fluid; said gun means comprising:

i. a body connected with said conduit means and having a bore communicating with the interior of said conduit means;

ii. nozzle means having a first passageway extending therethrough and terminating in a discharge aperture for discharging of a fluid; and

iii. valve means for controlling the flow of said fluid; said valve means being normally biased into a closed position and manually operable into an open position; said valve means having a first portion sealingly engaging said nozzle means and having a second passageway extending therethrough and communicating with said first passageway; said valve means having at least one inlet aperture communicating with said second passageway; said valve means being disposed in said bore of said body; said valve means also having a second portion sealingly covering said inlet aperture in a normal off position; and biasing means biasing said second portion toward said normal off position; said second portion being movable into a second and on position responsive to movement against said biasing means for controllably dispensing said fluid; said first and second portions of said valve means being easily and inexpensively replaceable such that once said gun means starts to be unreliable in operation, as by leaking, it can be replaced without having to replace the entire gun means; and

9 10 e. an insert to prevent skipping; said insert having a having a stinger that extends downwardly within body portion inserted within said bore of said body Said conduit means below Said bore of Said body for and defining an internal bore therewithin; and having an aperture communicating from the exterior to the interior of said body portion; said insert also 5 alleviating problems with skipping. 

1. Apparatus for dispensing a fluid comprising: a. container for holding said fluid; said container being capable of sustaining superatmospheric pressure and having a main valve for shutting off the flow of said fluid such that a valve means in a gun means can be changed without emptying said container; b. means for effecting flow of said fluid from said container for dispensing thereof; said means for effecting flow of said fluid from said container comprising a motive fluid stored in said container at superatmospheric pressure in conjunction with said fluid; c. conduit means for conducting said fluid to a location where it will be employed; said conduit means being connected with said container and having a first conduit protruding interiorly of said container; said conduit means having an inner liner that is impervious to said fluid and connected with said first conduit; said conduit means having a high strength outer hose enclosing said inner liner for preventing bursting and cold fLow thereof; and d. gun means for dispensing said fluid; said gun means being connected with said conduit means; said gun means comprising: a cap having an internally threaded aperture; an outer case adapted to conformingly fit said cap; a body connected with said conduit means and having a bore communicating with the interior of said inner liner of said conduit means; said body being of corrosion resistant material and including: A. an externally threaded portion threadedly connected with said internally threaded aperture of said cap; and B. a protrusion having a peripherally corrugated exterior for sealing connection with said conduit means; nozzle means having a first passageway extending therethrough and terminating in a discharge aperture; valve means having a first portion sealingly engaging said nozzle means and having a second passageway extending therethrough and communicating with said first passageway; said valve means having at least one inlet aperture communicating with said second passageway and penetrating laterally of said body; said valve means also having a second portion sealingly covering said inlet aperture in a normal ''''off'''' position; and biasing means biasing said second portion toward said normal ''''off'''' position; said second portion being movable into a second and ''''on'''' position responsive to movement against said biasing means for controllably dispensing said fluid; said first and second portions of said valve means being easily and inexpensively replaceable such that once said valve means starts to be unreliable in operation, as by leaking, it can be replaced without having to replace the entire gun means; and sealing means for sealingly connecting said protrusion with said conduit means; said sealing means comprising an adhesive material and a crimped metallic fitting compressing said inner liner and said outer hose against said corrugated exterior of said protrusion for maintaining the sealing connection and holding said fluid under said superatmospheric pressure.
 2. The apparatus of claim 1 wherein said fluid is more dense than said motive fluid and said interiorly protruding conduit comprises an elongate conduit that extends to the bottom of said container in the position in which it will be employed for emptying said fluid as the lower layer of fluid in said container.
 3. The apparatus of claim 1 wherein said fluid is less dense than said motive fluid and said interiorly protruding conduit comprises a short standpipe such that it will dispense said fluid as the upper layer above said motive fluid.
 4. The apparatus of claim 1 wherein said conduit means comprises dental hygiene hose with an impervious inner liner.
 5. Apparatus for dispensing a fluid comprising: a. container holding said fluid; b. means for effecting flow of said fluid from said container for dispensing thereof; c. conduit means for conducting said fluid to a location where it will be used; said conduit means being connected with said container and having a conduit protruding interiorly of said container; d. gun means for dispensing said fluid; said gun means comprising: i. a body connected with said conduit means and having a bore communicating with the interior of said conduit means; ii. nozzle means having a first passageway extending therethrough and terminating in a discharge aperture for discharging of a fluid; and iii. valve means for controlling the flow of said fluid; said valve means being normally biased into a closed position and manually operable into an open position; said valve means having a first portion sealingly engaging said nozzle means and having a second passageway extending therethrough and communicating with said first passageway; said valve means having at least one inlet aperture communicating with said second passageway; said valve means being disposed in said bore of said body; said valve means also having a second portion sealingLy covering said inlet aperture in a normal ''''off'''' position; and biasing means biasing said second portion toward said normal ''''off'''' position; said second portion being movable into a second and ''''on'''' position responsive to movement against said biasing means for controllably dispensing said fluid; said first and second portions of said valve means being easily and inexpensively replaceable such that once said gun means starts to be unreliable in operation, as by leaking, it can be replaced without having to replace the entire gun means; and e. an insert to prevent skipping; said insert having a body portion inserted within said bore of said body and defining an internal bore therewithin; and having an aperture communicating from the exterior to the interior of said body portion; said insert also having a stinger that extends downwardly within said conduit means below said bore of said body for alleviating problems with skipping. 